Udon
Οὔδων
Udon (Οὔδων, Ptol. 5.9.12), a river of Asiatic Sarmatia, which rises in the Caucasus and falls into the Caspian sea between the Rha and the Alonta. Most probably the modern Kuma.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.